Update init.lua

Remove old style flat inv images

mesecons_lightstone/init.lua

 function mesecon:lightstone_add(name, base_item, texture_off, texture_on)
 	minetest.register_node("mesecons_lightstone:lightstone_" .. name .. "_off", {
 	tiles = {texture_off},
-	inventory_image = minetest.inventorycube(texture_off),
 	groups = {cracky=2, mesecon_effector_off = 1, mesecon = 2},
 	description=name.." Lightstone",
 	sounds = default.node_sound_stone_defaults(),
@@ -13,7 +12,6 @@ function mesecon:lightstone_add(name, base_item, texture_off, texture_on)
     })
 	minetest.register_node("mesecons_lightstone:lightstone_" .. name .. "_on", {
 	tiles = {texture_on},
-	inventory_image = minetest.inventorycube(texture_on),
 	groups = {cracky=2,not_in_creative_inventory=1, mesecon = 2},
 	drop = "node mesecons_lightstone:lightstone_" .. name .. "_off 1",
 	light_source = LIGHT_MAX-2,